61420 has 24 divisors (see below), whose sum is σ = 134064. Its totient is φ = 23616.

The previous prime is 61417. The next prime is 61441. The reversal of 61420 is 2416.

It is a self number, because there is not a number n which added to its sum of digits gives 61420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699 + ... + 781.

It is an arithmetic number, because the mean of its divisors is an integer number (5586).

2⁶¹⁴²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67032).

61420 is an abundant number, since it is smaller than the sum of its proper divisors (72644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61420 is a wasteful number, since it uses less digits than its factorization.

61420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 61420 is about 247.8305872970. The cubic root of 61420 is about 39.4551111064.

Adding to 61420 its reverse (2416), we get a palindrome (63836).

The spelling of 61420 in words is "sixty-one thousand, four hundred twenty".